Sometime during the third movie Derek and Penny stopped by to see if they wanted to go out. As soon as Penny heard about the marathon she'd barged into the house, sent Derek to get candy and made herself cozy on the futon. They pressed play before Derek came back with snacks, but he'd already missed half the movie so he didn't mind.
Spencer and Ella took over the recliner; she was sprawled all over him like a cat. Derek and Penny were lounging on the far end of the futon, him against the arm rest, arm around his best friend, and her resting comfortably against him. The entire unit was close, but Morgan and Garcia went way back, and you could tell by how they were around each other.
Before the fourth movie there was another knock on the door. Derek announced that he'd called the rest of the team, but Hotch and Rossi were busy. JJ walks in carrying grocery bags of more snacks and popcorn, and Emily walks in with a case of beer and a few bottles of wine. The team did things as a whole, so the younger member of the team coming over for a Harry Potter marathon wasn't to strange. Granted they probably would have picked a different series to marathon.
JJ leans over the arm chair to give a hug to Ella, and Emily waves. Spencer's unit had become his friends, his family, and they'd accepted her as one of their own since they'd met. Ella and Spencer had been together since he was 19, she'd been 16, he moved to go to the police academy, and it had been really hard on her, but she wanted him, she loved him, so they worked hard to stay together. She would visit as much as high school and her parents would allow, and he would come out to Vegas whenever he could to see her. Things got much better for them though when life had gotten the fuck out of the way and she'd been able to move out to Virginia.